Probability Basics: And, Or, Not and Dice
Learn the basic probability rules for 'and', 'or' and 'not', independent and mutually exclusive events, and how to count dice outcomes.
Tagged: probability
5 guides.
The Binomial Distribution Explained Step by Step
When to use the binomial distribution, the formula for exactly k successes, at-most and at-least probabilities, and the mean and standard deviation.
The Poisson Distribution Explained with Examples
When to use the Poisson distribution, how to calculate P(X = k) from an average rate λ, and how it compares with the binomial distribution.
Permutations vs Combinations: When Order Matters
Learn the difference between permutations and combinations, the nPr and nCr formulas, and how to use them for lotteries, teams and passwords.
The Normal Distribution and Z-Scores Made Simple
Understand the bell curve, the 68–95–99.7 rule, z-scores and how to find normal probabilities, with worked examples on test scores and heights.